.header-container{
    width: 95%;
    color: #fff;
    margin: 0 auto;
    height: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.operation button{
    outline: none;
    border: none;
    padding:0 10px;
    cursor: pointer;
    border-radius: 5px;
    transition: .4s;
}

.operation button:hover{
    background-color: #065bff;
    color: #fff;
}

.operation span{
    margin-right: 5px;
}